*{
    padding: 0;
    margin: 0;
}
.home{
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
}
img{
    width: 100px;
    height: 100px;
}
.home-nav{
    width: 100%;
    height: 120px;
}
.home-nav dl{
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: space-around;
    align-items: center;
}
.p{
    width: 100%;
    height: 20px;
    display: flex;
    align-items: center;
    background: #ccc;
}
.ipt-div{
    width: 100%;
    display: flex;
    align-items: center;
}
.span{
    width: 80px;
}
.btn{
    width: 100%;
    display: flex;
    justify-content: space-around;
    align-items: center;
}
.demo-button{
    width: 200px;
    height: 50px;
}
.rv-button{
    width: 100%;
    height: 100%;
}